<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>documentName</title>
    <style>
      .ancestors * {
        display: block;
        border: 2px solid lightgrey;
        color: lightgrey;
        padding: 5px;
        margin: 15px;
      }
    </style>

    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
    <script>
      $(document).ready(function () {
        var listItemII = document.getElementById('dom')
        $('li').closest('ul', listItemII).css({ color: 'red', border: '2px solid red' })
      })
    </script>
  </head>

  <body class="ancestors">
    body (曾曾祖先节点)
    <div style="width: 500px">
      div (曾祖先节点)
      <ul id="dom">
        ul (第二祖先 - 第二个祖先节点)
        <ul id="dom">
          ul (第一祖先 - 第一个祖先节点)
          <li>
            li (直接父节点)
            <span>span</span>
          </li>
        </ul>
      </ul>
    </div>
  </body>
</html>
